Double-acting spring-hinge.



E. BOMMER. DOUBLE ACTING SPRING HINGE. APPLICATION FILED APR.15, 1913. RENBWED JULY 15, 1914.

1,131,651. Patented Mar.16,1915.

EMIL :soma/LER, or Naw Yoan, ii. Y.

DOUBLE-ACTING SPRING-HINGE.

Specification of Letters Patent.

Patented lillar. 16, 1915.

Application filed April 15, 1913, Serial No. 761,142. Renewed July 15, 1914. Serial No. 851,228.

T0 all whom t may concern.'

Be it known that I, EMIL BOMMER, a citizen of the United States of America, residing in New York, in the borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Double-Acting Spring- I-Iinges, of which the following 'is a specification.

This invention relates to certain improvements in the construction of the multiple webs by which the barrels of double-acting spring-hinges are connected.

In the patents which were granted to Lorenz Bommer, Nos. 348,312 of August 31, 1886, and 485,366 of November 1, 1892, double-acting spring-hinges with three, respectively, four-ply webs were employed for the first time, inasmuch as said Lorenz Bommer introduced for the first time, in place of the cast-metal webs and flanges of springhinges, the use of steel webs and flanges. The upper and lower edges of the webs and flanges, however, required milling or filing, etc., so as to produce the proper size of the multiple web and remove the rough edges produced by the dies.

The object of this invention is to improve the webs of double-acting spring-hinges in such a manner that a nished appearance is imparted to the upper and lower edges of the same, and that, in addition thereto, the webs will be able to resist in a higher degree the thrust and pull exerted thereon by the weight and operation of the door supported by the spring-hinges when the .same is opened in one or the other direction, and, furthermore, to relieve to some extent the shearing strain exerted on the rivets, screws,

welds, or other means of connection between the multiple layers or plates of the web.

For carrying out the objects statedtthe invention consists of a double-acting springhinge in which the upper and lower edges of the multiple webs connecting the barrels of the spring-hinge are provided with recesses and projections bent over to interlock with each other into one horizontal plane upon the upper and lower edges of the web, so that the recesses and projections interlock with each other and impart a rounded-ofi:l and iinished appearance to the edges of the web without requiring any milling, ling or other finishing operations.

In the accompanying drawing, Figures 1, 2, 3 and 4 represent the blanks respectively for a tubular two-ply, flat two-ply, three-ply and four-ply web of a double-acting springhinge, partly bent into shape, Figs. 5, 6, 7 and 8 are top-views, showing the barrels and multiple connecting web bent up from the blanks shown in Figs. 1 to 4, and Figs. 9, 10, 11 and 12 are vertical transverse sections of multiple webs shown in Figs. 1 to 4, taken on lines 9, 9, 10, 10, 11, 11 and 12, 12, Figs. 1 to 4 respectively.

Similar letters of reference indicate corresponding parts throughout the different ligures of the drawing.

l/Vhen a two-ply web made from a tubular blank, as shown in Fig. 1, is to be used, the upper and lower edges of one of the layers of the two-ply web are provided with two projections b1 extending approximately of the thickness of the metal both above and below the barrels Z), said projections having between them an intermediate recess b2, said recess being approximately of the thickness of the metal smaller in height than both the upper and lower edges of the barrels b, the upper and lower edges of the other layer being provided with an intermediate central projection o1 extending similarly both above and below the barrels o and two side-recesses o2 similarly of a smaller height than the barrels b. When the blank is bent into proper shape so as to form the two barrels and connecting web of the spring-hinge, the projections of one ply or layer are bent over into the recesses of the other ply or layer at the upper and lower edges of the web, so that a smooth, more or less rounded interlocking edge is obtained, as shown in Fig. 9.

When a two-ply web made from a single flat blank of sheet-metal, as shown in Fig. 2, is used, the upper and lower edges of the rear-layer of the web are provided with two projections b1 extending approximately for one thickness of the metal both above and below the upper and lower edges of the barrels b, and with an intermediate and two side recesses b2, said recesses being approximately of one thickness of the metal less in height than the upper and lower edges of the barrels o, the front-layer being provided with one central projection b1 divided by the meeting edges of the blank and two side-projections b1, all extending approximately for one thickness of the metal both above and below the barrels Z), and two intermediate recesses b2 approximately one thickness of the metal less in height than both the upper and lower edges of the barrels Z). When the blank is bent into proper shape so as to form the two barrels and connecting web of the spring-hinge, the projections of the layers are bent over into the recesses of the other ply or layer upon the upper and lower edges of the web, so that a smooth, more or less rounded interlocking edge Hush with the barrels of the hinge is obtained, as shown in Fig. 10.

When a three-ply web made from a single sheet of metal, as shown in Fig. 3, is used, the projections and recesses are arranged on the upper and lower edges of the rear and front and intermediate layers of the web; the projections Zal of the intermediate layer are at the same height as, and flush with, the upper and lower edges of the barrels Z); the recess b3 of the intermediate layer extending between the projections b1 of the same is approximately one thickness of the metal less in height than both the upper and lower edges of the barrels Z), the recesses Zig of the rear-layer and the recesses Z22 of the front-layer being of the same height as and flush with the upper and lower edges of the barrels b, while the projections b1 of the rear and front layers extend approximately for one thickness of metal above and belowvboth the upper and lower edges of the barrels Z2, so that when the projections of the rear and front layers are bent over and intermeshed with each other into the recess b3 extending between the projections of the intermediate layer, they become flush with the upper and lower edges of the barrels and the projections of the intermediate layer upon the upper and lower edges of the web, and abut against the inner sides of the recesses of the front and rear layers, so that a smooth, well iinished web with more or less rounded edges and of great strength is obtained, which relieves to some extent the strain upon the rivets or other means of fastening the layers together.

When a :tour-ply web of two separate blanks, as shown in Fig, 4, is used, the projections Zl of the intermediate layers of both barrels Z) are of the same height as, and Viiush with, the upper and lower edges of the barrels, while the recesses b3 of said intermediate layers extending between the projections Zpl of the same are one thickness of the metal less in height than both the upper and lower edges of the barrels b. The projec tions b1 at the top and bottom edges of the outer layers extend two thicknesses of the metal both above and below the upper and lower edges of the barrels, while the recesses Z22 of the outer layers are of the same height as, and flush with, the upper and lower edges of the barrels Z), so that when the projections Zyl of the outer layers are bent over and intermeshed with each other into the recesses b3 extending between the projections Z 1 of the intermediate layers they become flush with the top and bottom edges of the barrels b and with the projections of the intermediate layers, and abut against the inner sides of the recesses Z22 of the outer layers at the upper and lower edges oiC the four-ply web, the result is to relieve to some extent the strain upon the rivets and produce a four-ply web of greatly increased strength with well finished, more or less rounded upper and lower edges without the necessity of tiling, milling, or other inishing operations.

All t-he blanks may be provided in their webs with holes o through which finally the rivets 01 are passed that hold the multiple web together, or they may be welded together at a number of points.

I'claim: Y

1. A multiple web for the barrels of a spring-hinge, in which the upper and lower edges of the layers are provided with in'- termeshing recesses and projections which engage each other by the bending over of the projections into the recesses at the edges of the layers.

' 2. A multiple web for the barrels of aY double-acting spring-hinge, in which the upperand lower edges of the outermost layers arev provided with recesses and bent over projections interlocking with each other and with a. recess or recesses and projections oi'`VA the intermediate layer or layers of the webA upon the upper and lower ends of the web. Y 3. A multiple web for the barrels of double-acting spring-hinges, in which the upper and lower edges of the outer layers or f; plies of the web are provided with alternat-V ing recesses and bent over projections interlocked with each other flush with the projections of the intermediate layer or layers upon the upper and lower Yedges of the web. fl. A multiple web for the barrels o'a doubleeacting springfhinge, in which the upper and lower edges of the outermost layers are provided with projections intermeshing with each other and with the projections and a recess or recesses of the intermediate layer or layers upon the upper and lower edges of the web, the recess or recesses of the intermediate layer or layers being of lesser height than the recesses between the.,

projections on the outermost layers or plies.

5. A multiple web for thev barrels-f of double-acting spring-hinges, in which the upper and lower edges of the outermost layers or plies of the web are provided withj recesses and projections, said projections being bent over upon the recessed edges of the intermediate layer or layers or plies, and the intermediate layer or layers or plies being provided with a recess or recesses for intermeshing with the bent-over projections of the outer layers, the bent-over projections of one outer layer abutting against the in ner edge of the recess of the other outer layer and vice versa upon the upper and lower edges of the web.

6. In a multiple web for the barrels of a spring-hinge, the combination of the upper and lower edges of the layers or plies of the web provided with recesses and projections which engage each other by the bending over of the projections into the recesses at the edges of the layers to provide a locking connection in one direction so as to prevent movement of the parts in one direction but permit movement of the parts in another direction, and means in the body of the web for rigidly attaching the layers or plies together to prevent movement of the webs away from each other in the unimpeded direction possible when using only the first engaging means.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

EMIL BOMMER.

Witnesses:

PAUL GOEPEL, JOHN MURTAGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

